You should be constantly monitoring your own reactions to training and know when to deload or take a complete break etc; it really isn't that complicated or at least not as complex as some newcomers seem to think...it's akin to a cold or the flu or a stomach bug...with those you know how much of a break you need or don't need, it's the same with training.

It's not always the break that's the issue, it's the remembering to start-up again after the break that's the bigger problem for some.